US1236187A - Air-compressor for internal-combustion engines. - Google Patents

Description

H. LEMP. AIR COMPRESSOR FOR IN TERNAL COMBUSTION ENGINES.

HLED DEC. 26 I 91 a.

Patented wrucmm Aug. 7,191.7.

,w x .C. v X x 5 4 Inventor:

Hek-rnann Lamp,

Hus ttorne y Wihnesses: 1

I tion Engines 7 'gines of 40 crank eliambenairgmnst flow first stage DDSGG QV GlTgHIg pump portlon l a vention is shown a STATES PA ENT oFFIoE.

01'" ERIE, PENNSYLVANIA.- ASSIGNOR T0 GENERAL COMPANY, A eonrolm'r on on NEW YGRK.

ELECTRIC tlnl nqonignnsson non INTERNAL-COMBUSTION ENGINES.

S pecificntion of Letters Patent.

Patented Aug. 7, 19 17 np nwaonmed December 26,1618. summat ons.

m Air-G0mpressors f'o Internal-Combussbeoi-fi'oation:

9 :111 the "operationof mternal combustion s it is desirahle to maintain the'eran'ke I unrler a ight fwtci uin "to prerent th' ,ilibi -ieet.- il -thereinfrom" rough this hints and? also to r. eve an xhimst he pistoti ri-ngn into said chamber. Some eng nes;- notably 00m ression' cycle are rovided 'wit e01 J,-

rum-ting air; compressors for supplying low 20 pressurean' for"soaven'gmg purposes, and

hi h

glans-tier! chamber agai 11st th e compression prssam; Generally spoaking'the first sthe 'xe of jsueh a compressor is referred to as;

Iiniineistruetnre, but it is usually done for snnplvm ty and mineral cost. Mly llfl'lltlOII-JS directed especially to. en

ih' object to ing prove'their eonstruotion and operation} whereby the Said compressor, 1n

addition-to supplying the scavenging; and

fuel injecting or blast air, as itis commonly 85 oallethis utilized to maintain a slight vacuum- 'in'the'rank'olnunher. Tlo' prevent the norm '"presea -sueld'ng oilout )f -the crank chamber when so arranged, tin oilseparator is lqcatlsd in the conduit through which the on'it We) to the ofthe dornpressor.

In the aocm'n'panyin drawing. Whi'eh ill'ns trates one of the enihodiments of my inportion of an engine provided with a reciprocating air cornprt-sasor,

'severail iof'the pantq lindicates thei b contains'n closed crank ior, actuating the air compressor means otthe connecting ontop of the haste or rzinla" casing ceiver 6 of any suitable construction. L0

5 haveAinyentext-hewaml1 'efullmpi'ovementsh pressure :ai'r for injeeting fuel 'intothe;

glng r pnm psx ltisnot necessary .of' i to build the painp and compressor the last n'lentioneti typehnd has for.

a flange at its upper endQith" on the top of the receiver,

beln sh wn me sectiorn. aae o, the engine which chamber 2. Bindiv v 60 cates themain sh-nift of the engine havinggg l cated in the receiver is a reniprocating air compressor shown in dotted" lines. It co1n= prises a low pressure portion 7, commoniy referred to asft-he scavenging pump, an. in-

.termodiate pressure pertainv 8, and awhi hi pressure portion B the lat'ter suppli iiig t1e blast hair for injeotingfuel into ;t e coin bustion chambers of the working cylinders. The pieton 7 end, the cylinder of the seavenging'pump are both indicated by dotted lines; Tl'he scavengmgpump is of a' double acting type. While the intermediate and high pr ssure portions of the compressor aresin gle acting. The admission ofair to the scavenging pump and the (hseharge therefrom into the receiver is (rontrolledjby the reeiproeating valve 10, the latter being ac-' 'tuated hysnitable means from themain. shalftfi. The mainsupply of air to the scavenging pump is admitted to chamber ll; thmngh the screen 1.2 which is mounted directly above; Tn order to main tam a slight vacunm in the crank chamber to prevent luln'i'rant from being i foreed tin-(n gh the various joints and alsoto'c-arry off any exhaust gasos'which may leak intothe crank Qehambex" past the piston rings, a

conduit 13 is provided in the "s mp y the receiver oielsewhere which opens at its'luwer end into the crank chamber, other end opening into the snpplyehamber 11; Owing to the movements of. the various ,oranl'cs: in the crank chamber the lubricating oil is agitated and any deuce sucking air out of'the chamher is liable to oarry with it more or less luhrieant inv the form ofismall partieles or spray; To prevent this from entering the scavenging pump gafar asypossiblm an oil This eepnmtor the vertical conduit, 13.- v comprises a casing 1.4 which is qmgided with ,Loc'itted inside of the oasingjiiim tube 15 the upper end of whieh'isinto one endof the condnit '16, s'hid conduitforming a-eontinuatio'n ofthe" eondhitlKfind openin into the air snpplythafh. frll. The mile of the aped as to form a. Venthri "of which is formed by V 1 through which air mixed with a certain amount of luhrlcant is free e'eiiigl-land the tube 15. oftthecasing s provided separator 15 ynIovidetl which is loeatedyin fitter restini to flow on the suction strokes of the piston of the scavenging pump. Owing to the fact thattube 15 is only open at its lower end,

the flow ofair passing through the orifices 18 has to change from an upward to a downward direction, and in passing through the throat 17 of the Venturi tube its velocity is largely increased. This causcsthe particles of oil to be projected downward against the inclined lower wall 19 of the rasmg. In the wall is a small orifice 20 through which the lubricant is free to drop back into the conduit 13 and chamber Due to the fact that this orifice small in cross seetioi i, the tendency forj air to flow through it in an upward direction can be disregarded. After theairhas passed through the separator; it' flows .through the conduit 16 and there unites with the fresh air flowing through the sereei'i- 12 into the supply chamber. In other words, the screen and conduit 16 are arranged in multiple to supply air to' the scavenging pump, the greater portion of the air, however, being received through the screen By properly proportioning the cross sectional area of the conduit 16 and the inletarea of the chamber 11 'flOlll the screen. any desired vacuum can be maintained in the crank chamber 2., Generally speaking only a com- ]niratively slight vacuum is necessary in the chamber 2 to prevent lubricant from Working out through the various joints inthe crank casing.

thereto since it can bejutilized-With fourl have shown my 'invention in connection with a two-cycle engine but it is not'limited cycle engines in which case'the working pisions will have the function on their suction strokes as vthe piston. 7.

In accordance with the provisions of the patent statutes I have described the principle of operation of my invention, together writh the apparatuszwhich I now consider to represent the best embodiment thereof; but I desire to have it understood that the apparatus shown is only illustrative, and

other means.

\Vhat I claim as new and desire to secure by Letters Patent of the United States 1. In an apparatus of the character described, the combination of an internal oombustion engine having a closed crnn'k cao ing containing lubricant for the an int an air compressor driven by the engine and supplying air to it. said compressor having an air inlet and a valve contro to the inlet of the compressor at a int in advance of said valve as regnrds t e flow of air, said com ressor receiving air in parallcl through said inlet and the conduit leading from the crank casi whereby said compressor serves to wit draw I explosive from the crank casing and to maintain a slight vacuum therein to prevent the leakage of lubricant.

2. In an apparatus of the character described, the combination of an internal comling the some, and a conduit connecting the crank casing that the invention can be carried out by oustioncngine having a closed crank casing containing lubricant for the engmeyan air compressor driven by the engine and Supplying air to it, said compressor having an air inlet and evolve controlling the same,

' a conduit connecting the crank casing to the inlet of the compressor at a point in advance of said valve. its regards the flow of air, said;

compressor receiving air in parallel throu b said inlet and the conduit leading from t e crank casing, whereby said compressor serves to withdraw explosive gases from the crank casing and to maintain a slight day' of December, 1913, D0

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